Here is another smart door lock for your connected home. The Alfred DB2-B Smart deadbolt comes with Bluetooth connectivity, so you can unlock it with your smartphone. It has multiple power sources, so you are never locked out (AA batteries, Micro USB). These locks have a speaker built-in to welcome you home.
The Alfred DB2-B is Z-Wave compatible and supports up to 20 user pin codes. The Alfred Home app lets you see who has entered your home when. You can also send timed pin codes to your guests.[where to get it]
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